Hard Facing Electrodes

HF55

Descriptions
A rutile coated electrode designed for joining and surfacing 11-14% manganese steels. The deposited weld metal will work harden under impact load to a hardness of 480-590 HV. The electrode is recommended for use in the downhand position.

Applications
Can be used to reclaim worn austenitic manganese parts or as a buffer layer on other grades of steels prior to hardfacing. The deposit is extremely crack resistant and will rapidly work harden , making it ideally suited for welding on railway crossings, dredger buckets, crusher jaws, loader buckets, and other ground engaging equipment.

HF60

Characteristics
A basic coated AC/DC Electrode depositing a martensitic weld metal having a hardness of approximately 470 – 700H (47-60HRc). The weld metal has a good resistance to fine mineral abrasion with moderate resistance to impact.

Applications
Has been designed for application involving metal to mineral conditions such as those experience by earth moving equipment working in sandy conditions. Typical uses are grader blades, earth scoops, bucket lips, grousers, conveyor screws, blast hole augers, etc.

HF350

Characteristics
A basic coated electrode depositing a tough chrome alloy weld metal. The weld metalis capable of withstanding high impact and rolling loads with mild resistance to abrasive wear. The electrode is easy to use on AC or DC polarity featuring a very stable arc, neat beads and easily controllable weld deposit. The weld deposit is machineable.

Applications
Extensively used in the mining industry and is very useful for rail crossings and ends. All parts subject to medium wear requiring high impact values are protected by 350.

Procedures
Keep the arc short and hold it approximately 70°to the work piece. Keep deposits to a maximum of 3 layers and if a heavier build up is required, buffer layers of 168 are recommended. Use stringer bead technique and do not weave more than three times the diameter of the electrode.

Structure
Hypereutectic, with chromium hexagonal primary carbides in a austenitic matrix

Redrying
Re-dry damp electrodes at 350°C for 1 hour.

HF450

Characteristics
HF 450 is a basic coated AC/DC all position electrode, depositing a weld containing chromium, nickel and molybdenum. The weld metal, which comprises metallic carbides in a martinsetic matrix, has a hardness of 420-480HV(43-48HRc). The weld metal provides good resistance to abrasion and impact loads in wet and dry conditions.

Applications
This versatile electrode is suitable for use in applications where frictional loads and metal to metal wear conditions occur. The weld metal is extremely resistant to breakout or spalling, which makes it eminently suitable to use on permanent way crossings, rail ends, excavator bucket lips, tractor drive wheels, etc. The deposit, which is machinable with carbide tipped tools, is also suitable for use as a low cost buffer layer for the deposition of high alloy wear resistant deposits.